Convert indexed Sigma rules into analyst-ready detections.

title: Registry Modification Attempt Via VBScript - PowerShell
id: 2a0a169d-cc66-43ce-9ae2-6e678e54e46a
related:
    - id: 921aa10f-2e74-4cca-9498-98f9ca4d6fdf
      type: similar
    - id: 7f4c43f9-b1a5-4c7d-b24a-b41bf3a3ebf2
      type: similar
status: experimental
description: |
    Detects attempts to modify the registry using VBScript's CreateObject("Wscript.shell") and RegWrite methods embedded within PowerShell scripts or commands.
    Threat actors commonly embed VBScript code within PowerShell to perform registry modifications, attempting to evade detection that monitors for direct registry access through traditional tools.
    This technique can be used for persistence, defense evasion, and privilege escalation by modifying registry keys without using regedit.exe, reg.exe, or PowerShell's native registry cmdlets.
references:
    - https://www.linkedin.com/posts/mauricefielenbach_livingofftheland-redteam-persistence-activity-7344801774182051843-TE00/
    - https://www.nextron-systems.com/2025/07/29/detecting-the-most-popular-mitre-persistence-method-registry-run-keys-startup-folder/
    - https://detect.fyi/hunting-fileless-malware-in-the-windows-registry-1339ccde00ad
date: 2025-08-13
author: Swachchhanda Shrawan Poudel (Nextron Systems)
tags:
    - attack.defense-evasion
    - attack.persistence
    - attack.execution
    - attack.t1112
    - attack.t1059.005
logsource:
    category: ps_script
    product: windows
detection:
    selection:
        ScriptBlockText|contains|all:
            - 'CreateObject'
            - 'Wscript.shell'
            - '.RegWrite'
    condition: selection
falsepositives:
    - Some legitimate admin or install scripts may use these processes for registry modifications.
level: medium